Executing Select Commands
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Photo Gallery</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:DataList
id="dlstImages"
DataSourceID="srcImages"
RepeatColumns="3"
Runat="server">
<ItemTemplate>
<asp:Image ID="Image1"
ImageUrl='<%# String.Format("DynamicImage.ashx?id={0}", Eval("Id")) %>'
Width="250"
Runat="server" />
<%# Eval("Description") %>
</ItemTemplate>
</asp:DataList>
<asp:FormView
id="frmImage"
DataSourceID="srcImages"
DefaultMode="Insert"
Runat="server">
<InsertItemTemplate>
<asp:Label
id="lblImage"
Text="Upload Image:"
AssociatedControlId="upImage"
Runat="server" />
<asp:FileUpload
id="upImage"
FileBytes='<%# Bind("Image") %>'
Runat="server" />
<asp:Label
id="lblDescription"
Text="Description:"
AssociatedControlID="txtDescription"
Runat="server" />
<asp:TextBox
id="txtDescription"
Text='<%# Bind("Description") %>'
TextMode="MultiLine"
Columns="50"
Rows="2"
Runat="server" />
<asp:Button
id="btnInsert"
Text="Add Image"
CommandName="Insert"
Runat="server" />
</InsertItemTemplate>
</asp:FormView>
<asp:SqlDataSource
id="srcImages"
SelectCommand="SELECT ID,Description FROM Images"
InsertCommand="INSERT Images (Image,Description) VALUES (@Image,@Description)"
ConnectionString="<%$ ConnectionStrings:Images %>"
Runat="server" />
</div>
</form>
</body>
</html>
File: Web.config
<configuration>
<connectionStrings>
<add name="Images"
connectionString="Data Source=.\SQLEXPRESS;
AttachDbFilename=|DataDirectory|MyDatabase.mdf;Integrated Security=True;User Instance=True" />
</connectionStrings>
</configuration>
File: DynamicImage.ashx
<%@ WebHandler Language="C#" Class="DynamicImage" %>
using System.Data;
using System.Web;
using System.Web.Configuration;
using System.Web.UI;
using System.Web.UI.WebControls;
public class DynamicImage : IHttpHandler
{
public void ProcessRequest (HttpContext context)
{
string imageId = context.Request.QueryString["Id"];
SqlDataSource src = new SqlDataSource();
src.ConnectionString = WebConfigurationManager.ConnectionStrings ["Images"].ConnectionString;
src.SelectCommand = "SELECT Image FROM Images WHERE Id=" + imageId;
DataView view = (DataView)src.Select(DataSourceSelectArguments.Empty);
context.Response.BinaryWrite( (byte[])view[0]["Image"]);
}
public bool IsReusable
{
get {
return false;
}
}
}
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